fix: fix an issue that multi-arch images cannot be built from the project makefile

changelog/fragments/helm-fix-docker-buildx.yaml

@@ -0,0 +1,41 @@
+# entries is a list of entries to include in
+# release notes and/or the migration guide
+entries:
+  - description: >
+      (helm/v1) Fix an issue that multi-arch images cannot be built from the project Makefile.
+
+    # kind is one of:
+    # - addition
+    # - change
+    # - deprecation
+    # - removal
+    # - bugfix
+    kind: "bugfix"
+
+    # Is this a breaking change?
+    breaking: false
+
+    # NOTE: ONLY USE `pull_request_override` WHEN ADDING THIS
+    # FILE FOR A PREVIOUSLY MERGED PULL_REQUEST!
+    #
+    # The generator auto-detects the PR number from the commit
+    # message in which this file was originally added.
+    #
+    # What is the pull request number (without the "#")?
+    # pull_request_override: 0
+
+
+    # Migration can be defined to automatically add a section to
+    # the migration guide. This is required for breaking changes.
+    migration:
+      header: To fix multi-arch build, replace docker-buildx target in project Makefile
+      body: |
+        In the project `Makefile`, replace existing `docker-buildx` target with following definition.
+
+        ```make
+        docker-buildx: ## Build and push docker image for the manager for cross-platform support
+        	- docker buildx create --name project-v3-builder
+        	docker buildx use project-v3-builder
+        	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile .
+        	- docker buildx rm project-v3-builder
+        ```

internal/plugins/helm/v1/scaffolds/internal/templates/makefile.go

@@ -110,14 +110,11 @@ docker-push: ## Push docker image with the manager.
 # To properly provided solutions that supports more than one platform you should use this option.
 PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
 .PHONY: docker-buildx
-docker-buildx: test ## Build and push docker image for the manager for cross-platform support
-	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile
-	sed -e '1 s/\(^FROM\)/FROM --platform=\$$\{BUILDPLATFORM\}/; t' -e ' 1,// s//FROM --platform=\$$\{BUILDPLATFORM\}/' Dockerfile > Dockerfile.cross
+docker-buildx: ## Build and push docker image for the manager for cross-platform support
 	- docker buildx create --name project-v3-builder
 	docker buildx use project-v3-builder
-	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile.cross .
+	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile .
 	- docker buildx rm project-v3-builder
-	rm Dockerfile.cross
 
 ##@ Deployment
 

testdata/helm/memcached-operator/Makefile

@@ -95,14 +95,11 @@ docker-push: ## Push docker image with the manager.
 # To properly provided solutions that supports more than one platform you should use this option.
 PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
 .PHONY: docker-buildx
-docker-buildx: test ## Build and push docker image for the manager for cross-platform support
-	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile
-	sed -e '1 s/\(^FROM\)/FROM --platform=\$$\{BUILDPLATFORM\}/; t' -e ' 1,// s//FROM --platform=\$$\{BUILDPLATFORM\}/' Dockerfile > Dockerfile.cross
+docker-buildx: ## Build and push docker image for the manager for cross-platform support
 	- docker buildx create --name project-v3-builder
 	docker buildx use project-v3-builder
-	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile.cross .
+	- docker buildx build --push --platform=$(PLATFORMS) --tag ${IMG} -f Dockerfile .
 	- docker buildx rm project-v3-builder
-	rm Dockerfile.cross
 
 ##@ Deployment